Created attachment 292807 [details]
Full dmesg log

On a Lenovo T495 with AMD Ryzen 3700U PRO and Intel 9260 WiFi/BT the BT USB resets approximately every 4 seconds. It starts at reboot and happens regardless if BT and/or WiFi are in use. 

BT still works although there is sometimes lag with my Logitech MX Anywhere 2 BT mouse when it resets.

OS is Debian Bullseye, fully up to date. Issue happens on Distro kernel (5.8.0-2) as well as upstream built from git. 

[  200.978296] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  204.882294] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  208.786259] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  212.658660] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  216.562736] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  220.434207] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  224.338571] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  228.210158] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  232.114168] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  236.018643] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  239.890136] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  243.794141] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd
[  247.666226] usb 3-2.4: reset full-speed USB device number 5 using xhci_hcd

root@debian-PN:~# lsusb -tv
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/1p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 10000M
    ID 1d6b:0003 Linux Foundation 3.0 root hub
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
    |__ Port 1: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
        ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter
    |__ Port 1: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M
        ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter
    |__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
        ID 05e3:0610 Genesys Logic, Inc. Hub
        |__ Port 1: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M
            ID 5986:2113 Acer, Inc SunplusIT Integrated Camera
        |__ Port 1: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M
            ID 5986:2113 Acer, Inc SunplusIT Integrated Camera
        |__ Port 4: Dev 5, If 0, Class=Vendor Specific Class, Driver=, 12M
            ID 06cb:00bd Synaptics, Inc. Prometheus MIS Touch Fingerprint Reader
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
    ID 1d6b:0003 Linux Foundation 3.0 root hub
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub

root@debian-PN:~# dmesg |grep iw |grep firmware
[    4.434848] iwlwifi 0000:01:00.0: loaded firmware version 46.8902351f.0 9260-th-b0-jf-b0-46.ucode op_mode iwlmvm